The Neon Tetra is quite possibly the most well-known and popular aquarium fish in the hobby. It is surprising then that despite the fact they should know better by experience, many shops still happily sell and recommend the Neon Tetra as a 'first fish'. Once established in an aquarium, the Neon Tetra, given good conditions, is a hardy and long-lived fish. In a new aquarium however, they are very delicate and likely to suffer ill health due to fluctuations in water quality. This weakness may be a result of heavy commercial breeding. Neons must be kept in groups and preferably in aquariums with a few hiding spots amongst plants, good water quality, and with other small peaceful fish.